BA6- help with accruals and prepayments please!!

If anyone has any words of wisdom or tips to help me revise accruals and prepayments it would be very much appreciated! Done 2 mock exams for ba6 and keep losing marks on the final part of the exam which is testing your knowledge around the Income and expenditure accounts and adjusting for accruals and prepayments!

I studied with open study college and the material for not for profit accounts seems to be a little different than the other topics with little practice before exams and only a few example accounts to read through.